开发脚本自动部署及监控

1.编写脚本自动部署反向代理、web、nfs；

要求：　

I、部署nginx反向代理三个web服务，调度算法使用加权轮询；

#!/bin/sh

ngxStatus=`ps aux | grep -v grep |grep -c nginx`

function ngxProxyInstall() {
if [ -e /usr/sbin/nginx ];then
    echo "nginx already installed"
    exit 110
else
    yum install epel-release -y -q
    yum install gcc-* glibc-* openssl openssl-devel pcre pcre-devel zlib zlib-devel -y -q
    yum install nginx -y -q
    echo "install nginx successful"
fi
if [ -f /etc/nginx/nginx.conf ];then
    /bin/cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak
    sed -ri '/^http/a\t upstream luchuangao { 
	 server 192.168.152.135 weight=3;
	 server 192.168.152.136;
	 server 192.168.152.137;
	 }' /etc/nginx/nginx.conf
    sed -ri '/^ *location / {/a\t	 proxy_pass http://luchuangao;' /etc/nginx/nginx.conf
    echo "Configuration successful"
fi
if [ $ngxStatus -lt 2 ];then
    systemctl start nginx
    echo "Start nginx successful"
fi
}

function nfsInstall() {
if [ -e /usr/sbin/rpcinfo ];then
    echo "nfs already installed"
    exit 111
else
    yum install rpcbind nfs-utils -y -q
    echo "install NFS successful"
fi

if [ ! -d /share ];then
    mkdir -p /share
    chmod -R o+w /share
fi
echo '/share 192.168.152.0/24(rw,sync,fsid=0)' > /etc/exports
systemctl enable rpcbind.service
systemctl enable nfs-server.service
systemctl start rpcbind.service
systemctl start nfs-server.service
echo "Start NFS successful"
}

ngxProxyInstall
nfsInstall

II、所有web服务使用共享存储nfs，保证所有web都对其有读写权限，保证数据一致性；

#!/bin/sh

ngxStatus=`ps aux | grep -v grep |grep -c nginx`
ipAddress="192.168.152.134"

function ngxWebInstall(){
if [ -e /usr/sbin/nginx ];then
    echo "nginx already installed"
    exit 110
else
    #yum install gcc-* glibc-* openssl openssl-devel pcre pcre-devel zlib zlib-devel -y -q
    yum install nginx -y -q
    echo "install nginx successful"
fi
if [ -f /etc/nginx/nginx.conf ];then
    /bin/cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak
    sed  -ri '/^ *location / {/a\t	 root /data/www/html;
		 index index.html;' /etc/nginx/nginx.conf
    mkdir -p /data/www/html
    echo `hostname` > /data/www/html/index.html
    echo "Configuration successful"
fi
if [ $ngxStatus -lt 2 ];then
    systemctl start nginx
    echo "Start nginx successful"
fi
}

function nfsInstall(){
if [ ! -e /usr/sbin/rpcinfo ];then
    yum install rpcbind nfs-utils -y -q
    echo "install NFS successful"
fi
systemctl enable rpcbind.service
systemctl enable nfs-server.service
systemctl start rpcbind.service
systemctl start nfs-server.service
mount -t nfs $ipAddress:/share /data/www/html/
echo "welcome luchuangao" > /data/www/html/test.html
}

ngxWebInstall
nfsInstall

2.编写监控脚本，监控集群内 Nginx、NFS 服务存活状态，内存、磁盘剩余率检测，异常则发送报警邮件

步骤一：准备发送邮件的工具

#!/usr/bin/python
# -*- coding: UTF-8 -*-
import sys
import smtplib
import email.mime.multipart
import email.mime.text

server = 'smtp.163.com'
port = '25'

def sendmail(server,port,user,pwd,msg):
    smtp = smtplib.SMTP()
    smtp.connect(server,port)
    smtp.login(user, pwd)
    smtp.sendmail(msg['from'], msg['to'], msg.as_string())
    smtp.quit()
    print('邮件发送成功email has send out !')


if __name__ == '__main__':
    msg = email.mime.multipart.MIMEMultipart()
    msg['Subject'] = '你是风儿我是沙，缠缠绵绵回我家'
    msg['From'] = 'python4_mail@163.com'
    msg['To'] = 'python4_recvmail@163.com'
    user = 'python4_mail'
    pwd = 'sbalex3714'
    content='%s
%s' %('
'.join(sys.argv[1:4]),' '.join(sys.argv[4:])) #格式处理，专门针对我们的邮件格式

    txt = email.mime.text.MIMEText(content, _charset='utf-8')
    msg.attach(txt)

步骤二：将上述文件内容拷贝到/usr/bin/my_mail并chmod+x /usr/bin/my_mail

步骤三：然后新建监控脚本sysCheck.sh

#!/bin/sh

function ngxMonitor(){  #监控nginx服务
ps aux | grep nginx| grep -v grep &>/dev/null 
if [ $? -ne 0 ];then
    msg="TIME:$(date +%F_%T)
         HOSTNAME:$(hostname)
         IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')
         MSG:Nginx program is crash, Waiting to restart"
    echo $msg
    /usr/bin/my_mail $msg
    systemctl restart nginx
fi
}

function nfsMonitor(){ #监控nfs服务
ps aux | grep nfs| grep -v grep &>/dev/null
if [ $? -ne 0 ];then
    msg="TIME:$(date +%F_%T)
         HOSTNAME:$(hostname)
         IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')
         MSG:NFS program is crash, Waiting to restart"
    echo $msg
    /usr/bin/my_mail $msg
    systemctl restart nginx
fi
}

function memMonitor(){  #监控内存
mem_use=`free | awk 'NR==2{print $3}'`
mem_total=`free | awk 'NR==2{print $2}'`
mem_per=`echo "scale=2;$mem_use/$mem_total"|bc -l |cut -d . -f2`

if [ ! -e /usr/bin/bc ];then
    yum install bc -y -q
    echo "bc install successful"
fi
if (( $mem_per > 10 )); then
    msg="TIME:$(date +%F_%T)
         HOSTNAME:$(hostname)
         IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')
         MSG:Memory usage exceeds the limit,current value is ${mem_per}%"
         echo $msg
         /usr/bin/my_mail $msg
fi
}

function diskMonitor(){  #监控磁盘
space_use=`df $disk |awk 'NR==2{print $5}'|cut -d% -f1`

if [ $space_use -gt 80 ];then
    msg="TIME:$(date +%F_%T)
         HOSTNAME:$(hostname)
         IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}')
         MSG:Disk space usage exceeds the limit,current value is ${space_use}%"
    echo $msg
    /usr/bin/my_mail $msg
fi
}


ngxMonitor  &>>/tmp/monitor.log
nfsMonitor  &>>/tmp/monitor.log
memMonitor  &>>/tmp/monitor.log
diskMonitor &>>/tmp/monitor.log

3.编写计划任务，定时运行监控脚本，完成监控操作

* * * * * /shell/sysCheck.sh 

参考链接：http://www.cnblogs.com/linhaifeng/p/6602149.html

参考链接：http://www.cnblogs.com/linhaifeng/articles/6045600.html#_label21